of detroit



March 28, I FUSE BLOCK Re.

, 2 Sheets-Sheet l Original Filed Jan. 1 1930 i I I I J. MESSIVNG March 28, 1933. FUSE BLO K Re. 18,779

I 2 Sheets-Sheet 2 Original Filed Jan. 16, 1930 I INVENTZOR.

J5 I BY ATTORNEY.

Reissued Mar. 28, 1933 UNITED. STATES PATENT OFFICE JOSEPH MESSING, OF DETROIT, MTCHIGAN, ASSIGNOR TO B ULL DOG ELECTRIC PROD- UCTS COMPANY; OF DETROIT, MICHIGAN, A GO'RIPORATION.OF WEST VIRGINIA FUSE BLOCK Oiiginal'No. 1,817,521, dated. August 4, 1931, Serial reissue tiled October 21,

This invention relates to fuse blocks and more particularly to blocks upon which may types.

be mounted. one or more fuses of various It is an objectof this invention to provide a block adapted to interchangeably receive a plug fuse or a cartridge fuse, as may be which cartridge fuses and/or plug fuses may be mounted and in which is disposed means to cause the ejection of-one or more of the fuses mounted therein.

' A still further object of this invention is to provide a block which is compact, economical of manufacture and in which fuses may be conveniently mounted.

A still further object is to provide,in a fuse block,=a fuse ejector constructed to give a mechanical advantage to the operator.

Further objects of the invention will read ily occur to those skilled in the art upon refcrence to the following description and the,

accompanying drawings, in which Fig. 1 is an exploded perspective view of parts of the device.

Fig. 2 shows the method of binding a conducting wire to the screw shell.

Fig. 3 is aplan view of a fuse block embodying my invention.

Fig.4 is a section thereof along the line 4 4 of Fig. 3.

Fig. 5 is a section thereof along the broken line 55 of Fig. 3.

Fig. 6 shows, in perspective, .means to cause the ejection of a cartridge fuse.

Fig. 7 shows, diagrammatically,ejecting means for either one orboth of a pair of cartridge fuses.

Fig. 8 is a plan view of a block for receiving a plurality of fuses of each type and shows the mounting of the ejecting means of Fig.7.

Fig. 9 shows, diagrammatically, another modification of the fuse ejecting means.

' Referring more particularly to the draw- No. 421,273, filed January is, 1930. Application for 1 32. Serial No. 638,984.

'ings, Fig. 1 shows a pair of cartridge fuse receiving contact clips 11 and 12 between which is located a screw shell for receiving a plug fuse, not shown. The contact cli 11 is electrically connected to the base 13 o the shell and the other contact clip 12 is connected electrically to the center contact of the plug fuse receiving shell which in this case may be the screw 11, by means of the link or strap 14a. Accordingly, it will be noted that upon the insertion of a plugfuse or of a cartridge fuse, the line will be closed, permitting a flow of current therein.

The contact clips 11 and 12 are. mounted in the fuse block 15 in appropriate recesses 16 and 17 and are longitudinally aligned and spaced from each other in the manner shown.

The screw shell as above stated, is disposed between the clips and has a base portion 13 and a side wall 18, the latter having aligned slots 19 (Fig. 2) to provide a space in which may reside the cartridge fuse, the ends of which may be disposed in clips 11 and 12. When the device is assembled the slots 19 are longitudinally aligned with the contact clips, and since they are considerably larger in width than the diameter of the cartridge fuses, they provide a considerable clearance between the shell wall 18 and the cartridge fuse. The clip 11 is provided with an extension strip 20 which is electrically connected to the base 13 of the shell b the conducting wire 22 to the shell base 13. The other contact clip 12 is electrically connected through screw 14b to an appropriate conductor in a manner which is not shown, since it appears to be obvious, and is also electrically connected with the center contact 14: of the shell by means of a link 14a, as premeans of- .the screw 21, the latter serving a so to bind viously stated. Center contact or screw 14 serves also toassist in securing the shell 1n the block 15, and is insulated from the shell by means of the semi-circular fiber' disc 24 and the enlarged aperture 25 in the shell base 13. Screws 14 and 21 prevent rotation of the shell in the block.

The electrical circuits' may be traced as follows: When a cartridge fuse is to be used, the plug fuse is removed and current passes from conductor 22 through screw 21 and extension strip 20 to contact clip 11, thence through the fuse and to clip 12 and then out to the line conductor not shown. Either one 5 of these two fuses may be used, and since it;

is not necessary to use both at one time, my fuse block may be and preferably is made more compact by permitting the cartridge fuse to occup the space otherwise occupied by the plug use. The binding of line wire or conductor 22 a to its associated contact is shown best in Figthe cartridge fuse. Several forms of ejectors' are shown, and are now described. One form,

shown in Fig. 6, is mounted in a slot 31 which" may, if desired, run through the block from top to bottom thereof, forming a guideway for the cartridge fuse ejector 32 of Fig. 6. The latter is provided with an aperture 33 through which projects the end 34 of the cartridge fuse 35. To lift the fuse 35 from its resting place'in the clips 11 and 12, the handle I pulled out of the slot or guideway, the fuse being accordingly carried along therewith. A cover plate 37 may be and preferably is provided,said plate having a slot 38 in-which is disposed the ejector 32, and having a plug fuse receiving aperture 39.

Another means for ejecting the cartridge 1 fuse;from the clips 11 and 12 is shown in Figs. 7 and 8. In this modification, the block with two plug receiving shells, the latter construction forming a multiple fuse block. Element 41, pivoted at 42, is provided to cause the ejection of either or both of the car-- 46 trid e fuses.

are normally spaced from and are disposed -below the cartridge fuses. Upon swinging of element 41 on its pivot 42 in either direction, one or the other of the fuses is caused to ride out of contact of the clips in a manner which will be obvious.

It will be observed that I can dispense with the screw shell, by threadingthe plug fuse into screw threads in the block, and by providing side wall contacts. 1

Fig. 9 shows a simple push button ejector. when button 51 on rod 52 is pushed'inwardly of the block 15, link 53 and hammer 54 will cause the ejection of cartridge fusein an ob vious manner. It will be seen, therefore, that I- have pro- 7 videda construction which canaccommodate a cartridge fuse or a plug fuse in each branch 36 thereof is grasped and the'ejector 32 is- 15 is provided with four contact clips and E e nent 41 has cam faces 43 and 44 Whichto the fact that the cartridge fuse when used occupies the space otherwise occupied bythe plug fuse.

It can further be seen that I have provided means to eject or cause the ejection of a cartridge fuse from the block in a manner which will dispense with the necessity of the operator s -exposing his fingers to injury and dangen of shock,'the ejector being easily operable and conveniently mounted in or adjacent to the block.

It will further be observed that the ejector 41 is separate from and independent of the fuse and the fuse clips and further, is ful-' crumed with respect to the block so that the ejector supplies a mechanical advantage to the user of the ejector operating as a lever, cam or the'like on the fuses. Further, the eject-or permits the operator to eject the fuses without the operator having to rely on straight pull on the fuses. Further, the ejector, whether it be of the form of Fig. 7, or of i that of Fig. 9, supplies a directional and mechanical advantage to the operator, permitting the operator s fingers,.moving in a convenient direction, to eject the rather inconveniently located fuses.

Further, while ejector 41 is shown as of insulation, it might well be of metal with a part only of insulation, enough to insulate the operators finger from accidental contact with live parts, and/or enough to prevent any connection between the fuses of the pair.

. Further, while the ejector 41 may be moved to lift the fuse completely'out of the clips, it will be observed that a satisfactory operation maybeobtained by moving the ejector only part of the way, lifting-the fuseonly part of theway, relying on the springiness of the clips to snap the-fuse out, once the fuse has passed the middle part of the clip. Now having described the invention and the preferred form of embodiment thereof, it

is to be understood that the said invention is to be limited, not to the specific details herein set forth, but only by the scope of the claims which follow.

I claim v 1. A. fuse block haviifg contact clips to receive a cartridge fuse and having a screw shell to receive a plug fuse, the screw shell having a-shell contact and a center contact,

the shell contact being connected to one of the clips, and the, center contact being connected to the other one of the' clips, the block being adaptedto receive a plug fuse or a cartridge fuse. the shell and the clips lying in substantially thesame plane, and the shell being slotted so that a cartridge fuse can lie therein, transversely.

2.-In a fuse block, aligned contact clips adapted to receive cartridge fuse and a screw shell between said clips adapted to receive a plug fuse, the screw shell having its cylindri cal wall slotted to permit the cartridgefuse "adapted 'to receive a cartridge fuse and a screw shell'between said clips adapted to re ceive "a plug fuse, the screw shell having its cylindrical wall slotted to permit the carcause the ejection of the cartridge fuse from 'tridge fuse to occupy most of the space in said shell which might otherwise be occupied by the plug fuse, and means mounted in said-- block and free ofvthe' fuse and operable to the clips, the means being of insulation and being disposed between the shell'and that chp which is of opposite polarity with respect to it. r

' '4.In a fuse block, aligned contact clips adapted to receive a-cartridge fuse and a screw shell betweensaid'clips adapted to receive a plug fuse, the screw shell having its cylindrical wall slottedto permit the cartridge-fuse to occupy most of'the space in said shell which might otherwisebe occupied by the plug fuse, and'means mounted in said block and ifreeof the fuse and operable to cause the ejection of the cartridgefuse from the clips, said means-being so located as to permit free operation 'of the plug fuse, the

means being disposed'bet'ween the shell and one of the clips.

5. A fuse blockcomprising a base portion and a pair of upstanding walls, contact clips onsaid base between said walls, and a screw shell intermediate said contacts, said shell and said contacts being insubstantial alignment alongat least two-axes, said shell having slots in it's'side wall in alignment with said contacts.

6. A se block comprising a base portion and a pair of upstanding side walls. contact clips on said base between said walls and a screw shell intermediate said contacts, said shell and said contacts being in substantial alignment along at least two axes, said block havingmounted thereon means to cause the" ejection of a cartridge fuse from said contact clips, the means being-permanently mounted in the block, free ofthe fuse, between the shellandaclipy 5' g i 7. In a fuseblock, aligned contact clips adapted to receive a cartridge fuse and a.

screw shell between said clips adapted toreceive a plug fuse. the screw shell-having its cylindrical wall slotted to permit the cartridge fuse to occupy most of the space in said-shell occupied otherwise by the plug fuse, and means'electrioally connecting one of the contact clips to said shell.

8. In affuse block aligned contact clips adapted to receive a cartridge'fuse and a screw shell between said clips adapted to receive a plug fuse, said screw shell having its cylindrical wall slotted to permit the cartridge fuse'to occupy most of the'space in said shellotherwise occupied 'by the plug of the contact clips to said shell, comprising ,a conducting strap on said clip fastened to said shell at the base thereof. a

9. In a fuse block, contact clips adapted to receive a cartridge fuse and a screw shell aligned with and intermediate said clips adapted to receive a plug fuse, said shell comprising a base portion and spaced wing portions extending therefrom, the space between the wings being such as to enable a cartridge fuse to lie therein transversely.

10. In afuse block, contact clips adapted to receive a cartridge fuse and a screw shell aligned with and intermediate said clips adapted to receive a plug fuse, said shell comprising a base portion and wing portions extending therefrom, said wing portions being spaced from each other to enable a cartridge fuse to occupy most of the space therebetween.

11. In a fuse block, contact clips adapted to receive a cartridge fuse, a screw shell aligned with and intermediate saidclips adapted to receive a plug fuse, said shell comprising a base portion and wing portions extending therefrom, and means on said block between the shell anda clip and adapted to cause the ejection of a cartridge fuse from said clips. v

12. In 'a fuse block, contact clips adapted to receive a cartridge fuse, a screw shell aligned with and intermediate said clips adapted to receive a plug fuse, said shell comprising a base portion and wing portions extending therefrom, said wing portions being spaced from each other to enable a cartridge ,fuse to occupy most of the space therebetween, and means on'said blockbetween the shell and a clip and adapted to cause the ejection of a cartridge fuse from said clips.

13. In a fuse block, contact clips adapted to 14. In a fuse block, means to receive a cartridge fuse, and means to receive a lug fuse, both of said means being substantially coplanar and sodisposed with respect to each other that only one or the other of the fuses may be used at the same time.

15. Ina fuse block, contact clips adapted to receive a cartridge fuse, a screw shell aligned with and intermediate said clips adapted to receive a plug fuse, said shell comprising a base portion and wing portions extending therefrom,- and means on said block between the shell and a clip and adapted to cause the ejection of a cartridge fuse from permit free operation of the plug fuse.

7 adapted to receive ;a plug fuse, said'she ll 5; comprising a base portion and wing portions f extendingltherefrom and spaced from each other to enable a cartridge. fuse to occupy most of the space therebetween, and means on said block between the shell and a clip 10.

and adapted to causetheejection ofa cartridge fuse from saidclip's, said means being so located as topermit' freeoperation of the v I 'pl gifuis 17. In.a fuse block, fuse clips adapted to.

recei'vebetween them a cartridge fuse, and an ejector'means separate from and independent of said fuse and fulcrumed with :respect to said block and movable to eject said fuse from said clips, the mounting of the ejector giving the operator an advantage over the fuse holding influence of the clips. 7 18. In a fuse block, fuse clips adapted to receive between them a cartridge fuse, and an ejector means separate from and independent of Said cartridge fuse and fulcr'umed with m respect to said block and movable to eject f said fuse, from said clips, the mounting of r the ejector giving the operator a mechanical advantage over the fuse holding influence of ev ip 19.1? In a fuse. block, fu'se clips for holding a a cartridge fuse, andmeans, separate from and'independentof said fuse, and fulcrumed With'respeet to said block and adapted to be Imbvedfto'a position where it engages the fuse an'difor ces out of the clips, the mounting of the ejector giving the operator a directionl-advantage over the fuse holding influence ofthe clips. i i

4 9, "20. Ina use block, fuse clips adapted to j 'freceive between them a cartridge fuse, and an ejector mean'spivotally mounted in said 9 ,[block separate and independent of said cartridge fuse and movable to eject said fuse.

' 21..In a fuse block, alined fuse clips, a cartridge fuse connecting and held in the block by said clips, and means pivotally mounted in, the block independent of said fuse and said clips so as to be moved to a position where it engages the fuse and forces it-out of the clips.

' 22. In a'fuse block, a plurality of fuse clips, a plurality of cartridge fuses connecting and held in the block by said clips and "means mounted in said block independent of the fuses andmovable to eject one or more of said fuses as desired.

23. In a fuse block, a plurality of fuse clips, a plurality of cartridge fuses connecting and'held in the block by said clips, screw shells between the clips of each pair, and means mounted in said block independent of 55 the fuses and movable to "eject one or more of said fuses, asv desired, the means being between-the-shell and a clip.

an ejector means,,separate from an independent of said cartridge fuse and said clips and pivotally mounted with respect to said block and movable to eject said fuse.

25. In a fuse block, alined fuse clips, a cartridge fuse connecting and held inthe block by said clips, and means separate from and independent of said cartridge fuse and said clips and pivotallymounted with repect' to said block and fuse and movable to eject said fuse.

26. In a fuse block, alined fuse clips, a cartridge fuse connecting and held in the block by said clips, and means separate from and independent of said cartridge fuse and said clips and made of insulating material and pivotally mounted with respect to said block and movable to eject said fuse.

27. In combination, a fuse clip for holding the end of a cartridge fuse, and an ejector means separate from and independent of said fuse and said clips and, constructed and mounted to be movable by the operator to eject the fuse from the clip, and to give a mechanical advantage to the operator over the fuse holding influence of the clip.

28. In combination, a fuse clip for holding the end of a cartridge fuse, and an ejector means separate from and independent of said fuse and said clips and, constructed and mounted to be movable by the operator to eject the fuse from the clip, the ejector bemg fulcrumed with respect to the fuse so V as to give the operator a mechanical advantage over the fuse holding influence of the clip. I

29. In combination, a fuse clip for holding the end of a cartridge fuse, and an ejector means separate from and independent of said fuse and saidclips and, constructed and mounted to be movable-by the operator to eject the fuse from the clip, the ejector being fulcrumed with. respect to the fuse so as to give the operator a directional advantilige over the fuse holding influence of the c 1 {30. In combination, a fuse clip for holding the end of a cartridge fuse, and an ejector means separate from and independent of said fuse. and said clips and,,constructed and mounted to be movable by the operator to eject the fuse from the clip, the ejector being fulcrumed with respect to the fuse so as to give the operator a mechanical and direction- :11 advantage over the fuse holding influence of the clip.

31. In combination. a fuse clip comprising resilient retroverted jaws formed to have a tendency to eject a fuse completely, after the fuse is moved more than half way out of the clip, an ejector means separate from and independent of said fuse and said clips and,

constructed and mounted to be movable by the operator to lift the fuse at least part way out of the clip, the resiliency of the clip then tending to move the fuse end completely out of the clip.

32. In combination, a fuse clip comprising resilient retroverted jaws formed to havea tendency to eject a fuse completely after the fuse is moved more than half way out of the clip, an ejector means separate from and independent of said fuse and said clips and, constructed and mounted to be movable by the operator to lift the fuse at least part way out of the clip, the resiliency of the clip then tending to move the fuse end completely out of the clip, the ejector being so formed and mounted as to give the operator an advantage over the fuse holding influence of the clip.

33. In combination, a fuse clip comprising resilient retroverted jaws formed to have a tendency to eject a fuse completely after the fuse is moved more than half way out of the clip, an ejector means separate from and independent of said fuse and said clips and, constructed and mounted to be movable by the operator to lift the fuse at least part way out of the clip, the resiliency of the clip'then tending to move the fuse end completely out of the clip, the ejector being so formed and mounted as to give the operator a mechanical advantage over the -fuse holding influence of the clip.

34. In combination, afuse clip comprising resilient retroverted jaws formed to have a tendency to eject a fuse com letely after the fuse is moved more than half way out of the clip, an ejector means separate from and independent of said fuse and said clips and, constructed and mounted to be movable by the operator to lift the fuse at least part way out of the clip, the resiliency of the clip then tending to move the fuse end completely out of the clip, the ejector being so formed and mounted as to give the operator a directional advantage over the fuse holding influence of the clip.

In testimony whereof, I sign this specification.

JOSEPH MESSING. 

